I think the extra power is a great idea, I put 28 lbs in mine. The concern I would have is the physical size/weight of the 140 as it seems to be more like a 160/170. The weight and dimensions of the 140/170 are the same on the Kingtech web site.

The Kingtech product I have experienced was excellent, however, in this case I would suggest a Cheeta or one of the lighter 30 lb turbines.

PaulD